Core Insights - The discovery of a rare species, the copper fish, in the Luoma Lake area of Suqian, Jiangsu, indicates a positive trend in the water quality and overall ecology of the region [1][6]. Group 1: Species Discovery - The copper fish, belonging to the Cyprinidae family, is considered a valuable fish species and serves as an "environmental monitor" for aquatic ecosystems [3]. - This is the first recorded sighting of the copper fish in the Luoma Lake area, which highlights the ecological significance of the finding [1][4]. Group 2: Ecological Significance - The presence of the copper fish suggests improvements in the water quality and ecological conditions of Luoma Lake, which has been under ecological protection for the past five years [6]. - The lake has seen an increase in fish species diversity, with 43 fish species and 4 shrimp and crab species monitored since 2024, compared to the pre-protection period [6]. Group 3: Conservation Efforts - The implementation of comprehensive fishing bans and multi-departmental enforcement has contributed to the ecological recovery of Luoma Lake [6]. - Over the past five years, 98.8 million fish and crab species have been released into the lake to enhance biodiversity and improve water quality [6].